package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    SetmealDishMapper setmealDishMapper;
    @Autowired
    DishMapper dishMapper;
    @Autowired
    DishFlavorMapper dishFlavorMapper;

    @Override
    @Transactional
    public void save(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dish.setStatus(StatusConstant.ENABLE);
        //向菜品表插入数据
        dishMapper.insert(dish);

        //获取insert语句生成的主键值
        Long dishId =dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors !=null&&flavors.size()>0){
            //向口味表插入数据
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
             dishFlavorMapper.insertBatch(flavors);
        }

    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        //开始分页查询  页码，每页的记录数
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());

        Page<Dish> page = dishMapper.pageQuery(dishPageQueryDTO);

        List<Dish> result = page.getResult();
        Long total = page.getTotal();

        return new PageResult(total,result);
    }

    @Override
    public void delete(List<Long> ids) {
        //判断菜品是否在售
        for (Long id:ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus().equals(StatusConstant.ENABLE)) {
                //当前菜品起售中 不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
            //判断菜品是否是套餐关联
            List<Long>  setmealIds  = setmealDishMapper.getSetmealIdsByDishIds(ids);
            if(setmealIds !=null&&setmealIds.size()>0){
                throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
            }

            //删除菜品id批量删除菜品数据
            //sql: delete from dish where id in{?,?,?}
            dishMapper.deleteByIds(ids);


            //根据菜品id删除口味数据
            //sql: delete from dish_flavor where dish_id in {?,?,?}
            dishFlavorMapper.deleteByIds(ids);
    }
    /*
     * 根据id查菜品
     * */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //封装数据
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品表
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);

        //删除原有口味
        dishFlavorMapper.deleteById(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        //插入口味数据
        if(flavors!=null&&flavors.size()>0){
            //向口味表插入数据
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder().
                id(id).
                status(status).
                build();
        dishMapper.update(dish);
    }

    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
